CAMK PAN doctoral candidate Marios Kouzis, a fellow of the EU MSCA doctoral network TALES, has published his debut paper in The Astrophysical Journal Letters, together with prof. Agata Różańska, dr. Debora Lančová, prof. Bożena Czerny, and dr. Dominik Gronkiewicz. The work explains the transitions of changing-look active galactic nuclei (CLAGN) — sources whose luminosity and spectral type change dramatically within months to a few years, far faster than standard accretion-disk theory allows.
Using the diskvert code (Gronkiewicz+20, +23), developed at CAMK PAN, the authors show that a magnetically supported disk–corona model simultaneously reproduces the low Eddington ratios at which the transitions occur and their observed durations — something no previous model achieved from a single self-consistent set of disk solutions. Confronted with five well-observed CLAGN, including the especially constraining case of Mkn 590, the model leads to a clear conclusion: the inner accretion disk of these sources must be strongly magnetized.
Paper: DOI: 10.3847/2041-8213/ae8d11 | arXiv:2606.25654
